Spart...congrats on the PR. I see some things that we need to help you fix. Your hips are coming up and you're losing leverage. You would be able to pull more if we get this ironed out.

Do you concentrate on leading the lift with the head? I see when you tug on the bar your hips come up and your eyes go down. This is a sign to me that you're not leading with the head, but rather trying to pull the bar off the ground.

Think about standing up instead of pulling the bar off the ground. Standing is a natural movement that forces you to lead with the head, and generally helps you to keep better leverage. On the other hand, when you focus on pulling the bar off the ground, the hips tend to shoot up.